JP6225750B2 - Valve timing control device - Google Patents

Description

  The present invention relates to a valve opening / closing timing control device, and more specifically, a drive side rotating body that rotates synchronously with a crankshaft of an internal combustion engine, and a driven side that is connected to a shaft end of a camshaft for valve opening / closing and rotates integrally with the camshaft. The present invention relates to a valve opening / closing timing control device having a structure in which a control valve mechanism is disposed on a coaxial shaft and a rotating shaft core of a camshaft.

  As a valve opening / closing timing control device configured as described above, Patent Document 1 includes a driven-side rotating body including a driven-side rotating body, and a fluid conducting member (reference number 46 is set on the inner peripheral side of the driven-side rotating body). ), And the driven rotating body is fastened by a cylindrical screw member 14 in a state where the camshaft is brought into contact with the end of a camshaft (reference numeral 10). A control valve mechanism 94 is provided in the internal space of the screw member 14.

  In this Patent Document 1, the hydraulic oil supplied to the camshaft is supplied to and discharged from the control valve mechanism 94 via a fluid conducting member (reference numeral 46). Moreover, in this patent document 1, the fluid conduction member 46 is shape | molded in the shape which scraped off the inner peripheral part of the edge part by the side of a camshaft, and the dimension in the axial center direction of an outer peripheral side becomes longer than an inner peripheral side. Yes. Due to the shape of the conductor conducting member 46, when the screw member 14 is used, the outer peripheral portion comes into contact with the end of the camshaft 10. In addition, the outer periphery of the end portion on the cam shout side functions as a radial bearing 24, and the sprocket 22 of the driving side rotating body is rotatably supported by this.

  Patent Document 2 includes a driven-side rotating body (a rotor in the document) with respect to a driving-side rotating body (in the document, a housing), and the driven-side rotating body includes a front bushing, a vane rotor, A configuration is described in which the rear bushing is connected to the camshaft by a center bolt in a state where the rear bushing is in contact with the direction of the rotation axis.

  In Patent Document 2, a control valve mechanism is configured by supporting a spool so as to be slidable in a direction along a rotation axis while being fitted around a center bolt. The control valve mechanism is supplied with hydraulic oil from an introduction oil passage formed in a posture parallel to the rotating shaft core with respect to the rear bushing, and the second discharged oil in a posture in which the hydraulic oil from the control valve mechanism is orthogonal to the rotating shaft core. It is configured to be discharged from the road.

German Patent Application Publication No. 102008057492 (DE10 2008 057 492A1) JP 2013-245596 A

  Conventional valve opening / closing timing control devices change the relative rotational phase of the driving side rotating body and the driven side rotating body by supplying and discharging hydraulic oil to and from the advance angle chamber and the retard angle chamber. The opening / closing timing of the valve or the exhaust valve is set.

  As described in Patent Document 1 and Patent Document 2, in a valve opening / closing timing control device provided with a control valve mechanism inside a driven rotor, an oil passage for supplying hydraulic oil to the control valve mechanism is provided with a cam. It forms in the area | region ranging from a shaft to a driven side rotary body. However, if it is assumed that a driven-side rotator is formed using a single member and an oil passage is formed in the driven-side rotator, it is difficult to form the oil passage. For this reason, the driven rotor is provided with an inner rotor and the like and an intermediate member (fluid conducting member / reference numeral 46 in Patent Document 1: rear bush in Patent Document 2) as described in each patent document, An oil passage is formed in this.

  When such an intermediate member is used, the intermediate member is disposed at a position sandwiched between the internal rotor or the like of the driven-side rotating body and the camshaft, and is brought into pressure contact with a fastening force such as a bolt. By press-contacting in this way, it is possible to flow the hydraulic oil in a state in which the leakage of the hydraulic oil is suppressed at the joint surface between the driven rotor and the intermediate member or the joint surface between the intermediate member and the camshaft. ing.

  However, as described in Patent Document 1, when only the outer peripheral portion of the intermediate member is in contact with the camshaft, the fastening force by a bolt or the like acts in the direction of expanding the contact portion with the camshaft, Of these intermediate members, the closer to the camshaft, the greater the radius.

  When the end of the intermediate member is deformed so as to expand in this way, the inner diameter of the intermediate member increases with the deformation so as to increase toward the camshaft side, and is formed on the inner periphery of the intermediate portion. In some cases, the amount of fluid leakage in the flow path is increased.

  In contrast to such inconvenience, the rear bushing of Patent Document 2 has a configuration in which the entire surface from the inner peripheral side to the outer peripheral side is in contact with the camshaft. However, since the rear bush of Patent Document 2 is configured to supply hydraulic oil through an introduction oil passage formed in a direction along the rotational axis of the camshaft, this rear bushing is used when the fastening force of the rear bushing is low. There is room for improvement because hydraulic oil may leak from both ends.

  An object of the present invention is to rationally configure a valve opening / closing timing control device that suppresses fluid leakage in an intermediate member disposed between a driven-side rotator and a camshaft.

A feature of the present invention is that a driving-side rotating body that rotates synchronously with a crankshaft of an internal combustion engine, a driven-side rotating body that is disposed on the inner side of the driving-side rotating body and is coaxially rotatable with the driving-side rotating body. An intermediate member connected between the driven-side rotator and the camshaft; an attachment member attached to the driven-side rotator; and the drive-side rotator and the driven-side rotator. An advance chamber and a retard chamber, and a control valve mechanism disposed on the same axis as the rotation axis of the camshaft, and the control valve mechanism is interposed between the advance chamber and the retard chamber. And a flow path is formed to allow fluid to selectively flow in or out of the advance chamber and the retard chamber, and the drive side is driven by the inflow of fluid into the advance chamber and the retard chamber. A flow path for changing the relative rotational phase between the rotating body and the driven rotating body is formed. It is,
The intermediate member has an inner peripheral surface that is in contact with the outer peripheral surface of the mounting member, an outer peripheral surface that is in contact with the inner periphery of the drive-side rotator, a first side wall that is in contact with the driven-side rotator, A second side wall abutting on the camshaft, and a lead-out flow path for sending the fluid supplied to the inner peripheral surface to the control valve mechanism has a diameter at an intermediate position between the first side wall and the second side wall. It is in a point formed in a posture along the direction.

According to this configuration, it is possible to supply the fluid supplied from the inner peripheral surface of the intermediate member to the control valve mechanism via the outlet flow channel communicating with the inner peripheral surface. That is, in this configuration, a flow path is formed between the second side wall of the intermediate member and the camshaft, or between the first side wall of the intermediate member and the driven-side rotator so that fluid flows in the direction along the rotation axis. Therefore, the inconvenience that the fluid leaks at these boundary positions can be solved.
Here, in comparison with a configuration in which an annular groove is formed over the entire inner circumferential surface of the intermediate member and fluid is supplied to the outside through the annular groove, the configuration of the present invention has an inner circumference of the intermediate member. Since the outlet channel is formed in a hole shape on the surface, the area where the fluid contacts the boundary with the outer peripheral surface of the mounting member can be made smaller than the annular groove. For this reason, the inconvenience that the fluid leaks in the direction along the rotation axis between the inner peripheral surface of the intermediate member and the outer peripheral surface of the mounting member can be eliminated.
Accordingly, a valve opening / closing timing control device that suppresses fluid leakage in the intermediate member arranged between the driven-side rotator and the camshaft is configured.

  In the present invention, the outlet channel may reach the outer peripheral surface from the inner peripheral surface.

  According to this, it becomes possible to supply fluid between the outer peripheral surface of the intermediate member and the inner peripheral surface of the driving side rotating body, and supply fluid as lubricating oil between the intermediate member and the driving side rotating body. Realize smooth relative rotation.

  In the present invention, a groove to which a fluid is supplied may be formed on the first side wall.

  According to this, even when the connection force by the connection bolt is reduced or when a gap is formed between the intermediate member and the driven-side rotating body due to a difference in thermal expansion coefficient, the fluid flows from the groove portion to the first side wall. Since the pressure is applied between the intermediate member and the driven-side rotator, and the force is applied in the direction separating the intermediate member and the driven-side rotator, the positional relationship between the intermediate member and the driven-side rotator can be stabilized. To do.

It is sectional drawing of a valve opening / closing timing control apparatus. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a perspective view of a connecting bolt, an internal rotor, and an adapter.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration]
As shown in FIGS. 1 and 2, an external rotor 20 (an example of a drive side rotating body) that rotates synchronously with a crankshaft 1 of an engine E as an internal combustion engine, and an intake camshaft 5 coaxial with a combustion chamber of the engine E The valve opening / closing timing control device A is configured to include an internal rotor 30 (an example of a driven-side rotating body) that rotates integrally with the intake camshaft 5 so as to be relatively rotatable about the rotation axis X of the intake camshaft 5.

  This valve opening / closing timing control device A includes an internal rotor 30 with respect to the external rotor 20, and an electromagnetic control valve 40 as a control valve mechanism coaxially with the rotation axis X at the center position of the internal rotor 30. I have. The valve opening / closing timing control device A changes the relative rotational phase between the external rotor 20 and the internal rotor 30 by controlling the hydraulic oil (an example of fluid) by the electromagnetic control valve 40, thereby controlling the opening / closing timing of the intake valve 5V. Do.

  FIG. 1 shows an engine E (an example of an internal combustion engine) provided in a vehicle such as a passenger car. The engine E includes a crankshaft 1 at a lower portion, and a piston 3 is accommodated in a cylinder bore formed in a cylinder block 2 at an upper position of the crankshaft 1. The piston 3 and the crankshaft 1 are connected by a connecting rod 4. It is configured as a connected 4-cycle type.

  In addition, an upper portion of the engine E includes an intake camshaft 5 and an exhaust camshaft, and includes a hydraulic pump P (an example of a fluid pressure pump) that is driven by the driving force of the crankshaft 1. The intake camshaft 5 is configured to open and close the intake valve 5V by rotation. The hydraulic pump P is configured to supply the lubricating oil stored in the oil pan of the engine E to the electromagnetic control valve 40 as hydraulic oil (an example of fluid) via the supply flow path 8.

  The timing chain 7 is wound around the output sprocket 6 formed on the crankshaft 1 of the engine E and the timing sprocket 23S. As a result, the external rotor 20 is configured to rotate synchronously with the crankshaft 1. Although not shown in the drawings, a sprocket is also provided at the front end of the camshaft on the exhaust side, and a timing chain 7 is wound around the sprocket.

  As shown in FIG. 2, in the valve opening / closing timing control device A, the external rotor 20 rotates in the driving rotation direction S by the driving force from the crankshaft 1. The direction in which the inner rotor 30 rotates relative to the outer rotor 20 in the same direction as the driving rotation direction S is referred to as an advance angle direction Sa, and the opposite direction is referred to as a retard angle direction Sb. In this valve opening / closing timing control device A, when the relative rotational phase is displaced in the advance direction Sa, the intake compression ratio is increased as the displacement amount is increased, and when the relative rotational phase is displaced in the retard direction Sb, the displacement amount is increased. The relationship between the crankshaft 1 and the intake camshaft 5 is set so as to reduce the intake compression ratio as it increases.

  In this embodiment, the intake camshaft 5 is provided with the valve opening / closing timing control device A. However, the valve opening / closing timing control device A is provided on the exhaust camshaft, and both the intake camshaft 5 and the exhaust camshaft are provided. You may be prepared for.

[Valve opening / closing timing control device]
As shown in FIGS. 1 to 5, the valve opening / closing timing control device A includes an external rotor 20 and an internal rotor 30, and has a bush shape as an intermediate member at a position sandwiched between the internal rotor 30 and the intake camshaft 5. Adapter 37 is provided. In this valve opening / closing timing control device A, the outer rotor body 21 and the inner rotor body 31 are made of an aluminum alloy, and the adapter 37 is made of a steel material containing iron.

  The external rotor 20 includes an external rotor main body 21, a front plate 22, and a rear plate 23, which are integrated by fastening a plurality of fastening bolts 24. A timing sprocket 23 </ b> S is formed on the outer periphery of the rear plate 23.

  An internal rotor 30 is disposed at a position sandwiched between the front plate 22 and the rear plate 23. The outer rotor body 21 is integrally formed with a plurality of protrusions 21T that protrude inward in the radial direction with respect to the rotation axis X.

  The inner rotor 30 protrudes on the outer periphery of the inner rotor body 31 so as to come into contact with the inner peripheral surface of the outer rotor body 21 and the cylindrical inner rotor body 31 that is in close contact with the protruding end of the protruding portion 21T of the outer rotor body 21. And a plurality of (four) vane portions 32 provided.

  As a result, by disposing the inner rotor 30 in an encapsulated state with respect to the outer rotor 20, a plurality of fluid pressure chambers C are formed on the outer peripheral side of the inner rotor body 31 at an intermediate position between the protruding portions 21 </ b> T adjacent in the rotational direction. . These fluid pressure chambers C are partitioned by the vane portion 32 to form the advance chamber Ca and the retard chamber Cb.

  Further, a hole centering around the rotation axis X is formed in the central portion of the inner rotor 30 and the adapter 37 (an example of an intermediate member), and a connecting bolt 38 (an example of an attachment member) made of steel is formed in the hole. ) Is inserted. The connecting bolt 38 is formed with a bolt head portion 38H and a male screw portion 38S. The male screw portion 38S is screwed into the female screw portion of the intake camshaft 5, whereby the internal rotor 30 is connected to the intake camshaft 5. Is done.

  A regulation pin 39 that is parallel to the rotational axis X is fitted in a position that penetrates the contact surface between the inner rotor 30 and the adapter 37 and the contact surface between the adapter 37 and the intake camshaft 5. As a result, the internal rotor 30, the adapter 37, and the intake camshaft 5 rotate integrally around the rotation axis X.

  The connecting bolt 38 is formed in a cylindrical shape centered on the rotation axis X, and the electromagnetic control valve 40 is accommodated in this internal space. The configuration of the electromagnetic control valve 40 will be described later.

  As shown in FIG. 1, the relative rotation phase (hereinafter referred to as the relative rotation phase) between the outer rotor 20 and the inner rotor 30 across the adapter 37 and the front plate 22 is changed from the most retarded phase, which will be described later, to the intermediate lock phase. A torsion spring 28 is provided to apply a biasing force.

  Further, a lock mechanism L that locks (fixes) the relative rotational phase between the outer rotor 20 and the inner rotor 30 to a predetermined phase is provided. The lock mechanism L includes a lock member 25 that is guided by a guide hole 27 in a direction along the rotation axis X with respect to one vane portion 32, a lock spring that projects and urges the lock member 25, and A lock recess formed in the rear plate 23 is provided.

  The lock mechanism L is configured such that when the relative rotation phase reaches the most retarded phase, the lock member 25 is engaged with the lock recess by the urging force of the lock spring, and the relative rotation phase is held at the most retarded phase. Function.

[Valve opening / closing timing control device: oil passage configuration]
The space in which the relative rotational phase is displaced in the advance direction Sa by the supply of hydraulic oil is the advance chamber Ca. Conversely, the space in which the relative rotational phase is displaced in the retard direction Sb by the supply of hydraulic oil is delayed. This is the corner chamber Cb. The relative rotational phase in a state in which the vane portion 32 has reached the operating end in the advance angle direction Sa (including the phase near the operation end of the vane portion 32 in the advance angle direction Sa) is referred to as the most advanced angle phase. The relative rotational phase in a state in which reaches the operating end in the retarding direction Sb (including the phase near the operating end of the vane portion 32 in the retarding direction Sb) is referred to as the most retarded phase.

  The internal rotor body 31 is formed with an advance passage 33 that communicates with the advance chamber Ca and a retard passage 34 that communicates with the retard chamber Cb. The advance channel 33 communicates with the lock recess.

  This valve opening / closing timing control device A is configured such that the lock mechanism L reaches the locked state when the relative rotational phase reaches the most retarded phase. When hydraulic fluid is supplied to the advance chamber Ca in this locked state, the hydraulic fluid is supplied from the advance channel 33 to the lock recess, so that the lock member 25 is resisted against the urging force of the lock spring. The lock is released from the lock recess and the locked state is released.

[Electromagnetic control valve / oil path configuration]
As shown in FIG. 1, the electromagnetic control valve 40 includes a spool 41, a spool spring 42, and an electromagnetic solenoid 44. That is, the spool 41 is slidably disposed in the inner space of the connecting bolt 38 in the direction along the rotation axis X, and the connecting bolt 38 is a stopper formed of a retaining ring for determining the operation position on the outer end side of the spool 41. 43 is provided. Further, the spool spring 42 applies a biasing force in a direction in which the spool 41 is separated from the intake camshaft 5.

  The electromagnetic solenoid 44 includes a plunger 44a that protrudes by an amount proportional to the electric power supplied to the internal solenoid, and operates the spool 41 by the pressing force of the plunger 44a. Further, it is arranged outside the valve timing control device A.

  As a result, the spool 41 and the spool spring 42 rotate together with the internal rotor 30, and the electromagnetic solenoid 44 becomes unrotatable by being supported by the engine E.

  In the spool 41, land portions 41A are formed on the inner end side (the intake shaft 5 side) and the outer end side, and an annular groove portion 41B is formed around the entire circumference of these land portions 41A. The inside of the spool 41 is formed hollow, and a drain hole 41 </ b> D is formed at the protruding end of the spool 41. In addition, the plurality (four) of the advance angle channels 33 and the plurality (four) of the retard channels 34 are formed from the connecting bolt 38 to the inner rotor body 31.

  That is, the advance flow path 33 is formed in a form that is formed in the inner rotor main body 31 from the outer periphery of the connecting bolt 38. In particular, as shown in FIGS. 1, 3, and 4, the retarded flow path 34 is formed in the annular recess 37 </ b> C of the adapter 37, the groove 37 </ b> G of the adapter 37, and the inner rotor body 31 from the outer periphery of the connection bolt 38. It is comprised by the hole-shaped part made.

  The electromagnetic solenoid 44 is disposed at a position where the plunger 44a can be brought into contact with the outer end of the spool 41, and is held at the non-pressing position shown in FIG. 1 in a non-energized state, and the spool 41 is held at the advance position shown in FIG. Is done. Further, in a state where a predetermined power is supplied to the electromagnetic solenoid 44, the plunger 44a reaches the inner end side pressing position, and the spool 41 is held at the retard position. Further, by energizing the electromagnetic solenoid 44 with a lower power, the protruding amount of the plunger 44a is limited, and the electromagnetic solenoid 44 is held at a neutral position that is intermediate between the retard position and the advance position.

  A supply flow path 8 for supplying hydraulic oil from the hydraulic pump P is formed in the engine constituent member 10 that rotatably supports the intake camshaft 5.

  A supply space 11 to which hydraulic oil from the supply flow path 8 is supplied is formed inside the connecting bolt 38, and a check valve 45 made of a spring and a ball is provided inside. Further, an intermediate recess 38A to which hydraulic oil from the check valve 45 is supplied is formed on the outer periphery of the connecting bolt 38 in an annular shape over the entire periphery. Further, a supply hole 38 </ b> B for supplying hydraulic oil to the spool 41 is formed at a position outside the spool 41 in the connecting bolt 38. An annular groove 35 communicating with the supply hole 38B is formed on the inner periphery of the inner rotor body 31.

  The adapter 37 includes an inner peripheral surface 37A having an inner diameter that contacts the outer peripheral surface of the intermediate portion of the connecting bolt 38, an outer peripheral surface 37B that contacts the inner periphery of the rear plate 23, and a first side wall 37S1 that contacts the inner rotor body 31. The second side wall 37S2 is in contact with the intake camshaft 5.

  In this adapter 37, a plurality of (four) outlet channels 37D are formed in a penetrating state by drilling so that hydraulic oil supplied from the intermediate recess 38A of the connecting bolt 38 to the inner peripheral surface 37A is sent to the outer peripheral surface 37B. In addition, a plurality (four) of branched flow paths 37E that are parallel to the rotation axis X are formed so as to send the hydraulic oil from each of the outlet flow paths 37D in the direction of the first side wall 37S1.

  The inner rotor body 31 is formed with a plurality (four) of extended channels 35A linearly communicating with the plurality (four) of branch channels 37E in a state of communicating with the annular groove 35 described above. .

  An annular recess 37C is formed in a form in which a part of the inner peripheral surface 37A of the adapter 37 on the first side wall 37S1 side is cut out. The annular recess 37 </ b> C is located at a position communicating with the retarded channel 34 formed in the connection bolt 38 in a hole shape. The first side wall 37S1 is formed with a plurality of grooves 37G radially in a region extending from the annular recess 37C to the outer peripheral surface 37B. The groove portion 37G constitutes a part of the retarded channel 34.

  As a result, the hydraulic oil from the hydraulic pump P is supplied from the supply flow path 8 to the supply space 11, and is further supplied from the check valve 45 to the intermediate recess 38 </ b> A. The hydraulic oil supplied to the intermediate recess 38A is sent from the inner peripheral surface 37A of the adapter 37 to the plurality of outlet channels 37D, and the branch channel 37E, the extension channel 35A, the annular groove 35, and the supply hole communicated therewith. It is supplied to the groove part 41B of the spool 41 via the part 38B sequentially.

  Since the hydraulic oil is supplied in this way, when the spool 41 is in the advance position, the hydraulic oil is supplied from the advance channel 33 to the advance chamber Ca, and the hydraulic oil in the retard chamber Cb is retarded. It is returned to the internal space of the spool 41 through the flow path 34. As described above, since the retarded flow path 34 is configured, the hydraulic oil in the retarded angle chamber Cb flows from the retarded flow path 34 of the inner rotor body 31 to the groove 37G (retarded flow path 34) of the adapter 37. Then, it flows with the annular recess 37C (retarding flow path 34) of the adapter 37.

  As a result, the relative rotational phase is displaced in the advance angle direction Sa. When hydraulic oil is supplied to the advance chamber Ca in a state where the lock mechanism L is in the locked state, hydraulic oil is supplied to the lock recess, so that the lock member 25 is locked by the pressure of the hydraulic oil. The relative rotational phase is displaced in the advance direction Sa after the lock mechanism L reaches the unlocked state.

  Further, when the spool 41 is operated to the retard position, the hydraulic oil is supplied from the retard channel 34 to the retard chamber Cb, and the hydraulic oil in the advance chamber Ca is directly passed through the advance channel 33. Thus, it is discharged from the outer end of the spool 41. Further, when hydraulic oil flows through the retarded flow path 34, the groove 37 </ b> G (retarded flow path 34) of the adapter 37 and the inner rotor main body 31 from the annular recess 37 </ b> C (retarded flow path 34) of the adapter 37. The hydraulic fluid flows into the retarding flow path 34 and is supplied to the retarding chamber Cb. As a result, the relative rotational phase is displaced in the retarding direction Sb.

  Further, the hydraulic oil supplied to the inner peripheral surface 37A of the adapter 37 is supplied to the outer peripheral surface 37B of the adapter 37 through a plurality of outlet channels 37D, and the rear plate that is externally fitted to the outer peripheral surface 37B. Lubricating is performed between the inner peripheral surface of 23.

  For example, in the situation where the connecting bolt 38 extends due to the action of the heat of the hydraulic oil, if the internal rotor body 31 dissipates heat, the internal rotor body 31 and the adapter 37 A slight gap may be formed between the adapter 37 and the adapter 37. When the gap is formed in this way, the positions of the inner rotor main body 31 and the adapter 37 in the direction along the rotation axis X may not be maintained at a predetermined position.

  For such inconvenience, the pressure of the hydraulic oil flowing in the groove 37G formed in the first side wall 37S1 of the adapter 37 is configured to act in a direction in which the inner rotor main body 31 and the adapter 37 are separated. Yes. This makes it possible to suppress the phenomenon that the internal rotor body 31 and the adapter 37 are in an unstable positional relationship by using the pressure of the hydraulic oil even in a situation where a gap is created due to the difference in thermal expansion coefficient.

[Operation / Effect of Embodiment]
As described above, according to the present invention, the use of the adapter 37 facilitates the formation of the flow path as compared with the case where the flow path is formed with respect to the internal rotor body 31. Further, when the flow path formed in the adapter 37 is formed as a through hole that is supplied from the intake camshaft 5 to the internal rotor body 31 in a posture parallel to the rotation axis X, for example, the adapter 37 and the intake air There is a possibility of leakage at a boundary portion between the camshaft 5 or a boundary portion between the adapter 37 and the inner rotor main body 31. On the other hand, as in the present invention, hydraulic oil supplied from the inner peripheral surface 37A is supplied to the outlet channel 37D formed between the first side wall 37S1 and the second side wall 37S2 in the adapter 37. As a result, the possibility of leakage is reduced and the displacement of the relative rotational phase can be reliably performed.

  Further, in comparison with a configuration in which an annular groove is formed on the inner peripheral surface 37A of the adapter 37 over the entire circumference and fluid is supplied to the outside through the annular groove, in the configuration of the present invention, the inner peripheral surface 37A of the adapter 37 is provided. On the other hand, in order to form the lead-out flow path 37D in a hole shape, the region where the hydraulic oil contacts the boundary with the outer peripheral surface of the connecting bolt 38 is made smaller than the annular groove. For this reason, the problem that hydraulic oil leaks in the direction along the rotation axis X between the inner peripheral surface 37A of the adapter 37 and the outer peripheral surface of the connecting bolt 38 can be eliminated.

  Further, by forming the lead-out flow path 37D as a through hole extending from the inner peripheral surface 37A to the outer peripheral surface 37B, hydraulic oil is supplied between the outer peripheral surface 37B of the adapter 37 and the external rotor 20 to smooth the relative rotational phase. Realization of operation.

  Furthermore, even when the position of the adapter 37 or the inner rotor main body 31 in the direction along the rotational axis X becomes unstable due to the difference in the coefficient of thermal expansion, the pressure of the hydraulic oil flowing in the groove 37G of the adapter 37 is used. Positional stabilization is also realized.

[Another embodiment]
The present invention may be configured as follows in addition to the embodiment described above.

(A) The outlet channel 37D formed in the adapter 37 is formed as a non-through hole that does not reach the outer peripheral surface 37B. That is, the outlet flow path 37D is formed from the inner peripheral surface 37A to the intermediate position in the radial direction of the adapter 37, and the flow path (in the embodiment, the branch flow) guides the hydraulic oil from the intermediate position toward the inner rotor body 31. (Corresponding to the path 37E) may be formed.

  As a specific processing form for forming the lead-out flow path 37D as a non-through hole in this way, drilling is performed from an oblique direction (a direction inclined with respect to the rotation axis X) with respect to the inner peripheral surface 37A of the adapter 37. It is possible. Moreover, after forming in the penetration state similarly to the derivation | leading-out flow path 37D shown in embodiment, it is also considered that the opening by the side of the outer peripheral surface of this derivation | leading-out flow path 37D is plugged.

(B) In order to improve the lubricity on the outer peripheral surface 37B, a dedicated through hole reaching from the inner peripheral surface 37A to the outer peripheral surface 37B is formed in the adapter 37. Thereby, the working oil is positively supplied to the outer peripheral surface 37B to realize good lubrication.

(C) For the first side wall 37S1 of the adapter 37, a dedicated groove 37G for applying the pressure of the hydraulic oil to the boundary position between the adapter 37 and the inner rotor main body 31 is formed. By forming the groove 37G in this way, pressure is always applied between the inner rotor body 31 and the adapter 37 regardless of the position of the spool 41, and the positions of the inner rotor body 31 and the adapter 37 become unstable. Inconvenience can be suppressed.

  INDUSTRIAL APPLICABILITY The present invention can be used for a valve opening / closing timing control device configured such that an intermediate member is sandwiched between a driven-side rotator and a camshaft.

1 Crankshaft 5 Camshaft (Intake camshaft)
20 Drive-side rotating body (external rotor)
30 Driven side rotating body (internal rotor)
37 Intermediate member (adapter)
37A Inner peripheral surface 37B Outer peripheral surface 37D Derived flow path 37G Groove portion 37S1 First side wall 27S2 Second side wall 38 Mounting member (connection bolt)
40 Control valve mechanism (electromagnetic control valve)
Ca Lead angle chamber Cb Delay angle chamber E Internal combustion engine
X rotation axis

Claims (3)

A drive-side rotating body that rotates synchronously with the crankshaft of the internal combustion engine;
A driven-side rotator disposed on the inside of the drive-side rotator so as to be rotatable relative to the drive-side rotator and coaxially;
An intermediate member connected between the driven-side rotator and the camshaft;
An attachment member attached to the driven rotating body;
An advance chamber and a retard chamber formed between the drive side rotor and the driven side rotor,
A control valve mechanism disposed on the rotation axis and the coaxial axis of the camshaft;
A fluid passage is formed that allows fluid to selectively flow into or from the advance chamber and the retard chamber through the control valve mechanism with respect to the advance chamber and the retard chamber, A flow path for changing a relative rotational phase between the driving side rotating body and the driven side rotating body is formed by inflow of fluid into the advance chamber and the retard chamber,
The intermediate member has an inner peripheral surface that is in contact with the outer peripheral surface of the mounting member, an outer peripheral surface that is in contact with the inner periphery of the drive-side rotator, a first side wall that is in contact with the driven-side rotator, A second side wall abutting on the camshaft, and a lead-out flow path for sending the fluid supplied to the inner peripheral surface to the control valve mechanism has a diameter at an intermediate position between the first side wall and the second side wall. A valve opening / closing timing control device formed in a posture along the direction.   The valve opening / closing timing control device according to claim 1, wherein the outlet channel reaches the outer peripheral surface from the inner peripheral surface.   The valve opening / closing timing control device according to claim 1, wherein a groove portion to which a fluid is supplied is formed on the first side wall.

Images